Revolving door mechanism



m M ,.aw L m mf@ W fun S N U. N m, W www ,m e N ,mm d 7U m My m m m [W5 H M Am. M. m m L ,M w... w, m f ,u Q, s a .w 1l.. K wm QN MN Nm] wm 15, 193. T. M. HAGENBOOK REVOLVING DOOR MECHANISM Musa Filed April' 2e, 1937 e sheets-shed INVEToR.

' ATToRN ZLISZ K O O B N E G A H M T REVOLVING DooR MECHANISM- Filed April 26, 1957 6 Sheets-Sheet 3 ATTORN T* 15, 1938. T. M. HAGENBOOK MLSZ REVOLVING DOOR MECHANISM I A Filed April 26, 1937 6 Sheets-Sheet 4 iii ATTORNEY T. M. HAGENBOOK REVOLVING DOOR MECHANISM Filed April 26, 1937 6 Sheets-Sheet 5 INVENTOR.

BY d ATTORNEY Marichxl 1938. T, M HGENBOOK ZLS REVOLVING DOOR MECHANISM Filed April 26, 1957 G SheebS-Sheeb 6 34 W Mumia; @V

BY d ATTORNEY Patented Mar. 15, 1938 UNITED sraras z,111,is2

' '2,111,1sv2f j anvoLviNG-.noonivmoHANrsM ThnrloeM. Hagenbook, Evansville, Ind., assignor to International Door "Company, Ind., a corporation oit' Illinois Evansville,

Application yanni 26,? 1937 serial 139,079

' 23 claims'. (or 520518) My invention relates broadly to revolving ldoor mechanism and more particularly to a construction of revolving door mechanism having special provision" for effecting simultaneous lcollapse .of the revolving doorv wings under conditions o panic. Y v

One of the objects of my invention is to `pro'- vide a construction of revolving door mechanism having means for facilitating the collapsing` of revolving door wings toa parallel collapsed-position or a bookfold. f

Another object of my invention is to provide a construction of revolving doorY mechanism which includes in addition to themechanism for latching therevolving door wings in normal position', a simultaneous release mechanism for all of the revolving door wings which becomes effective upon the application of excessive pressure against any one of the revolving door wings.

Another object of my invention is to provide a construction of pin cam for use in association with the main cam of a revolving ldoor mechanism and operative under conditions of abnormal pressure against any one of the revolving door wings for effecting a quick releaseof all of the revolving door wings for permitting a vquick collapsing of all of the revolving door wings under condition of panic.

Another object of my invention is to provide a construction of revolving door mechanismhaving means for presetting the revolving door wings in latched positions for normal operation of the revolving door in combination with means adapted to be automatically coupled with the presetting means for effecting a quick release oifithe latched revolving door wings under conditions of excessive pressure applied againstany one ofthe Wings.

Still another object of my invention is to provide a construction of revolving door mechanism having a pair of coacting cam devices with means for uncoupling the devices in presetting the revolving door wings in original latched position while closely coupling the coacting cam systems after completion of the latching operation, the second cam system being operative under conditions oi abnormal pressure applied against any one of the revolving door wings for imparting movement to the iirst cam system and eiecting simultaneous release of all of the revolving door Wings.

A still further object of my invention is to provide a construction of auxiliary cam mechanism operative Within a limited angular path of movement in coaction with the main 'cam mechanism ci: a revolving door for effecting the simultaneous release of allot the-revolving door wings of a revolvingrdoor'assembly when abnormal pressure -isvgeirertedvlagainst any one of therevolving door Wlgsa Agistill further object of my invention is to providesa construction of clutch device interconnecting themain cam and auxiliary cam of a revolvingmdoor mechanism for allowing the presettingofmthe main camindependently of the auxiliaryvfcamfor latching the revolving door wings rin normal positions while allowing the auxiliaryy cam mechanism to drive the main cam mechanismpfor efecting simultaneous release of all of the revolving door Wings under conditions ci yexcessive pressure applied against any one of the revolving door-wings.

Other andfurther objects of my invention reside in the construction of revolving door mechanism asset forthmore fully in the specication hereafter following by reference tothe accompanying drawings, in which:

,Figure 1'i illustrates the revolving door mechanism of my invention applied to a revolving .door assembly; Fig. 2 is a horizontal sectional view through, the revolving door mechanism of my inventionvwith certain l of the reciprocatory plungers, the-V-pincam, the main cam and the vactuatingpinion for the pin cam illustrate-d in elevation, the parts being shown in normal positions kwith the revolving door wings latched in radial planes; liiguf is a plan view partially broken away and with parts illustrated in section showing the cam mechanism shifted to release position pursuant to abnormal pressure exerted against onev of the door wings in the direction of the arrow indicated in the lower right portion of the ligure, with the door Wings free to be collapsed into parallel or bookfold positions; lrliigy.` ll illustrates the relationship of parts of the revolving door mechanism with the several parts shifted Yto release position and illustrating the door wings shifted into collapsed positions paral- .lel one-with respect to another; Fig. 5 shows the revolving .door mechanism restored to latched position withtwo of the door wings restored to latched position and two of the door wings prepared for return to normal latched position; Fig. 6 isa verticalsectional view taken substantially lon line te@ of Fig. 2 with certain of the parts illustratedin'elevation; Fig. 7 is a vertical longitudinal sectional view taken vsubstantially on vlinel--lof Fig. `3 with certain of the parts i1- lustratedinelevatiom Fig. 8 is a perspective view showing the relationship of the main cam, the

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auxiliary cam, one of the reciprocatory plungers, the actuating pinions and the clutch device embodied in the revolving vdoor mechanism of my invention; Fig. 9 is a perspective View of the coacting housing embodied in association with the structure illustrated in Fig. 8; Fig. 10 is a vertical sectional View taken substantially on line ll-lll of Fig. 2 and illustrating more particularly the actuating pinions an-d the clutch mechanism shown in elevation; Fig. 11 shows a portion of the View illustrated in Fig. illustrating the manner of presetting the main cam by disengagement of the clutch mechanism by use of the manually insertable wrench illustrated in the drawings; Fig. 12 is an enlarged elevational view of the clutch mechanism and actuating pinions embodied in the structure of my invention; Fig. 13 is a Vertical sectional view through the pinions and associated clutch mechanism taken substantially on line l3-I3 of Fig. 10 with certain of the parts shown in side elevation; Fig. 14 is a vertical sectional View of the clutch and pinionassembly taken substantially on line l4-I4 of Fig. 11 and showing the clutch faces disengaged for enabling the position of the main cam to be adjusted upon insertion of the wrench as illustrated; Fig. 15 is a top plan view of the pin or auxiliary cam embodied in the construction of my invention; Fig. 16 is a bottom plan view of the pin or auxiliary cam illustrated in Fig. 15; Fig. 17 is a side elevational View of the pin or auxiliary cam looking in the direction of arrow B in Fig. 15; Fig. 18 is an end elevational View of the pin or auxiliary cam looking in the direction of arrow A; Fig. 19 is a transverse sectional view taken substantially on line l9-l9 of Fig. 15; and Fig. 20 is a transverse sectional view taken substantially on line 2li-20 of Fig. 15.

My improved construction includes a pin or auxiliary cam which is controllable from a pinion device actuated by an insertable hand tool. The main cam is shiftable within a range of not more than 60. The pinion is associated with a ratchet tooth clutch by which disengagement of the pin cam is effected while imparting angular movement to the main cam. The cam mechanism includes a pin cam and a main cam which are conoentrically mounted for simultaneous or independent movement. Simultaneous movement of the pin cam and the main cam occurs under panic conditions. Independent movement of the main cam without movementof the pin cam is accomplished by inserting a tool in the pinion device and effecting disengagement of the pin cam while allowing an, angular shifting of the main c-am. The pin cam will be automatically restored to its initial position by action of the spring device on the pin cam.

The pinion device includes a main pinion meshing with the gear teeth on the main cam and a pinion engageableV through the operation of a clutch with gear teeth carried on one of the arms of the pin cam.

In the assembled revolving door hardware employing radially positioned reciprocatory plunger members individual to each of the door wings, the main cam has the faces thereof coacting with the plungers and effecting a projection of the plungers or allowing a retraction thereof. When excess pressure is applied simultaneously against any two of the door wings as is likely to occur under conditions of panic, there is a tendency to cause a recession of the plungers individual to the door vwings to which excessive pressure is applied. The recession is brought about by the tendency of the latching roller individual to each revolving door wing to ride against the abutting projecting face of the plunger, thereby tending to force the plunger inwardly. As the plunger moves inwardly the end of the plunger abuts one arm` of the pin cam, tending to angularly shift the pin cam clockwise. Shifting of the pin cam clockwise angularly moves one arm of the pin cam having teeth formed therein, which engage With one of the pinions on the pinion device which operates through the associated clutch for imparting movement to the other pinion which correspondingly shifts the position of the main cam. This shifting precedes relative displacement of the ratchet teeth in the clutch device asv the main cam completes its movement which allows the simultaneous release of pressure on the latching rollers individual to each of the revolving door wings permitting collapsing of the revolving door wings to parallel collapsed position or a bookfold.

When it is desired to restore the door wings to normal position, the tool is inserted in the socket provided in the pinion device, which action disengages the ratchet tooth clutch, and the main cam is returned to normal position. The tool is allowed to remain in the socket of the pinion device so that the associated clutch between the main cam and the pinion cam remains disengaged. The revolving door wings may now be restored to normal position and snapped into place. The tool is then removed v allowing the clutch to be engaged7 thereby securing unitary .action of the two pinion members and allowing simultaneous control of both the pin cam and the main cam. This automatically sets the simultaneous release preparatory to a panic condition.

It is understood that the use of the pin cam is conned to the lower unit only and is not ernbodied in the upper hardware unit. The upper unit is similar to the structure set forth in the copending applications of John W. Shields, Serial No. 757,941, filed December 17, 1934, now issued as Patent 2,081,774, and Serial No. 125,508, filed February 12, 1937.

The construction of my invention also permits the plunger members to be loaded to heavier tension, allowing the telescoping member to be projected a shorter distance inwardly from the plunger block than in the constructions of the aforesaid applications. The advantage of this is that when the main cam is in the position of a full collapse, the plunger members are withdrawn toa point where the` normal engaging member is practically clear, thus allowing the further collapse of the door with little or no pressure. This makes a simultaneous release mechanism much more effective than has been possible heretofore.

The pin cam is normally maintained in position under the action of a spring acting upon one arm ofthe pin cam. I have provided on the pin cam, a lug that will contact one point of the main cam when the main cam has been rolled to a full collapsed position. This lug then holds the points of the pin cam out of the path of the plungers. Any travel of any other plunger, therefore does not cause a movement of the pin cam. Without this lug further movement of any other plunger would cause further rotation of the main cam, the pin cam always returning to the normal position through the ratcheting effect of the clutches. This extra movement added to the main cam after it has assumed a full collapsed vposition would cause damage to the teeth cut fis on the periphery of the large part of the -main cam, because the teeth on the main cam con.- stitute a mutilated gear'having a limited number of teeth.V The operating pinion being a full circle of teeth would be damaged when the uncut section of the main cam would reach the teeth on the pinion.

Referring to the drawings in more detail, reference character I designates the revolving door wings of a revolving door assembly utilizing the revolving door mechanism of my invention. 'Ihe revolving door wings are carried by hangers 2 connected with the revolving door mechanism indicated at 3 and 4 supported by the revolving shaft indicated at 5. 'Ihe revolving shaft is indicated schematically as mounted between upper journal 6 in ceiling structure l and lower journal 8 in foundation structure 9. I have represented the manner of mounting the revolving door wings I schematically as it will be understood-that the revolving door Wings may be supported in various ways.

The revolving door hardware designated generally at 3 constituting the upper support for the revolving door wings has the form. set forth more particularly in John W. Shields copending application Serial No. 125,508, filed February 12,1937, supra. The revolving door mechanism indicated generally at 4 constituting the lower mounting for the revolving door wings is shown in detail in the remaining gures of the drawings herein. The revolving door hardware indicated at 4 includes a disc member I8 having a central upwardly extending tubular portion II which surrounds and conforms with the shaft 5 of the revolving door. A suitable key and keyway connection indicated at I2 is provided between lshaft 5 and sleeve I I of disc member I0. The disc member I is provided withquadrilaterally shaped grooves |4 on the exterior face thereof and a central recess I on the adjacent interior face thereof for receiving the end flange portion I5 of the main cam 'I'he main cam Il has a cylindrical central sleeve portion I8 concentrically disposed about the central cylindrical sleeve portion of the disc member I0. The sleeve portion I8 of the main cam Il is shaped to provide a plurality of diametrically disposed cam faces which I have shown generally at 20 in Figs. 2,' 5, 6 and 8. The cam faces 28 are arranged to coact with the plungers of the radially shiftable latching members 2| shown more particularly in Figs. 2 9, inclusive. The radially shiftable latching members 2| are mounted for radial movement in confined paths through the radiallyl disposed channels 22 provided in the coacting housing member 23. 'Ihe coactingY housing member 23 is aligned with the disc member I8 when assembled and compactly encloses all of the parts of the revolving door mechanism. Suitable means are employed for maintaining the coacting housing 23 in alignm'ent and connection with disc I8 such as screw members indicated generally at 24 passing through disc member I0 and into screw threaded recesses 25 on opposite sides of the channel-ways 22 provided at coacting housing 23. The channel-ways 22 through which the latching members 2| are adapted to radially shift are each provided with a Hunting slot 26 through which a confining pin 21 carried by the individual latching members 2| extends and serving to limit the radial movement of each of the latching members so that the latching members are never wholly displaced through the channel-ways 22.

The latching members 2| are each provided with a radially extending bore 28 in which the plunger 29 is movable within limits controlled by, pin 38 passing through latching member 2| and through slot 3| in plunger 29. The plunger 29 is spring pressed to projected position by means of coil spring 32, the tension on which is adjusted by set screw 33 adjustable through screw threaded aperture 34 in the arcuate shaped latching face 35 in latching member 2 I. The set screw 33 is provided with a shoulder 36 with respect to which annular member 31 is aligned for providing an abutment with the end of variable tension coll spring 32. Y

Each of the latching members 2| have the arcuate shaped faces 35 arranged for engaging the roller members 38 carried by each of the revolving door wing carriers 2. Each of the roller members 38 are mounted in the wing carriers concentrically with respect to the groove engaging members 39. The groove engaging members 39 each coact with the annular groove 40 in disc i9 for guiding the wing carriers 2 to collapsed or bookfold positions. The groove engaging members 39 each project on opposite sides of the wingY carriers 2 suiiiciently to provide limiting stops for determining the minimum spacial relation of the wing carriers when in collapsed positions, as indicated for example in Figs. 4 and 5.

The revolving door wings may be moved from collapsed or bookfold positions to radial positions in which the latching faces 35 of the latching members 2| engage the roller members 38.

' The revolving door wings are then firmly latched in radial position'by rotatably shifting the main cam I1 to a position in which the faces 28 thereof engage the frusto-conical ends 29a of the plungers 29 increasing the loading on springs 32 and correspondingly increasing the pressure of latching faces 35 against roller members 38. The rotation of main cam Il is accomplished by operation of pinion 4|! which meshes with the gear teeth 4| formed on a portion of the periphery of the ange I6 of main cam Il. The pinion 4t, as shown more particularly vin Figs. -14 has a hollow hub 42, one end of which projects into the recess 43in disc member I4, providing a journal for pinion 48. The other end of the hollow hub is provided with a pair of diametrically opposed slots 44 through which a pin member 45 carried by the cylindrical member 45 extends. The cylindrical member 46 is provided with a clutch face constituted by ratchet teeth 41 formed about the upper peripheral edge thereof. The cylindrical sleeve member 46 is continuously spring pressed to an upward engaging position as illustrated in Figs. 10, 12 and 13 by means cf coil spring 48 which continuously acts against the slidable central member 49 through which the diametrically extending pin 45 extends. The hub 42 of pinion 49 has a cross section corresponding in cross section with that of the central member 49 of polygonal shape for preventing any relative rotation between cylindrical member 46 and pinion 48 while allowing longitudinal or slidable displacement of cylindrical member 46" with respect to pinion 49 as indicated in Figs. 11 and 14. I have shown in Figs. 2,` 3, 4 and Sthe cross section of member 49 and th-e parts coacting therewith as hexagonal.

Housing 23 is apertured in alignment with the vertical axis of pinion 40 and is provided with a depending tool engaging socket member 58 which extends into. substantial abutment with the slotted end 44 of the hollow hub 42 of pinion 48. The socket 5|) provides a sleeve with respect to which the cylindrical member 45 is displaceable. The Socket member 55 and sleeve constituted thereby serves as a guide for cylindrical member 46 as cylindrical member 45 shifts to engaging or discngaging position. Sleeve 55 is concentrically surrounded by the pinion member 5| having integrally connected ratchet teeth 52. The ratchet teeth 52 form in coaction with ratchet teeth 41, opposite parts of an engageable and disengageable clutch.

The pinion 5l meshes with gear teeth 53 on the end of the pin cam 54, shown more particularly in Figs. 15-20. The pin or auxiliary cam 54 is substantially flat in Vcontour and is capable of independent movement with respect to the main cam El. The pin or auxiliary cam 54 is centrally apertured at 55 and fits concentrically about tubular portion il of the main cam I! and between the upper extremity of the tubular portion of the main cam and the under face of the coacting housing 23. The pin or auxiliary cam has a radially extending portion 55 on which the teeth 53 are formed. A diametrically opposite extension 5l is provided on the pin cam and from this extension there projects an arm 58, the end of which is off-set as indicated at 59, and provided with a substantially lateral portion 50. The lateral portion 55 carries a pin 5i which serves as a connecting means for coil spring 52 which connects with stud 53 xed in disc i@ as shown more clearly in Fig. 8, whereby the pin cam 54 is maintained under continuous tension with teeth 53 in mesh with the teeth on pinion 5|. The pin cam 55 is also provided with apair of diametrically opposite extensions 54 and 55 on axes substantially normal to the axes on which extensions 56 and 5i are disposed. yEach of the extensions 56, 5l, 5ft, andL 55 are shaped to provide cam faces which coact with the shiitable latching members 2l as illustrated more clearly in the plane assembly views, Figs. 2, 4 and 5. The top surface of the cam is illustrated in Fig. l5. In the reversed position, Fig. 16, it will be observed that the cam faces as well as the exterior of the central portion of the auxiliary cam is charnfered as shown at 55 and 52. The lower face of the cam is provided with a depending lug 68 which serves as a limiting abutment with respect to the main cam El when the main cam has been rolled to a full collapsed position illustrated in Figs. 3 and 4. That is to say, the lug 53 abuts against the side wall portion 59 of main cam il. This abutment thus provides for maintaining the pin cam out of the path of the plungers. Any travel of any other plungers therefore will not cause movement of the pin cam. II it was not for the provision of the lug 58, a further movement of any other plunger would cause further rotation of the main cam. Because of the ratcheting effect of the clutch faces l? and 52, the pin cam returns to normal position. Extra movement added to the main cam ll after it has assumed a full collapsed position would cause damage to the gear teeth cut on the periphery of the flange of the main cam at 4| because there are but a limited number of teeth constituting a mutilated gear on the main cam. The lug 68 contacting With portion 59 of the main cam, serves as a limiting stop to prevent operating pinion it from being injured by any tendency of the teeth of pinion 45 rolling upon the toothed peripheral portion 5| of the iiange i5 of the main cam.

In Figs. l, 5 and ll, I have illustrated the manner in which the socket wrench 'lll is inserted in the socket of the sleeve 50 in effecting a resetting of the cam mechanism. The wrench 'l includes a handle portion 1| and parts of a universal joint 'l2 from which there extends an insertable wrench head 13. The insertable wrench head I3, as indicated in Fig. 14, contacts slidable central member 49, shifting cylindrical sleeve member 45 and disengaging the ratchet teeth 41 with respect to the ratchet teeth 52 thereby allowing movement to be imparted directly through sleeve 50, slidable central member 49 and cylindrical sleeve member 45 through ,diametrically extending pin 55, hub 42 and pinion 4i). Pinion 40 meshing with teeth 4| on flange I5 of main cam I7 allows main cam I to be moved into a position in which the cam faces 2U contact the frusto-conical shaped end 29a. of the plungers 29, thereby moving plungers 29 against the pressure of coil springs 32 for maintaining latching members 2| in projected position. During the resetting operation, no movement is imparted to pinion 5|. Accordingly, the position of the pin or auxiliary cam 54 is wholly controlled by spring 62 yieldingly maintaining the end of lateral portion 5E! of arm 58 in abutment with stud 63 preparatory to a quick simultaneous release operation of the door wings under condition of panic.

The normal latched position of the revolving door wings is shown in Fig. 2. In the event of sudden abnormal pressure against any one of the door wings, such as the door wing represented in Fig. 3 in the lower right-hand corner of the drawings, roller member 38 drives radially shiftable latching member 2| inwardly. This operation is similar to the operation set forth in John W. Shields copending application Serial No. 125,- 508, filed February l2, 1937, and arises by virtue of the differential faces 15 and' 'l5 on opposite sides of the latching faces 35 of the latching members 2| and wherein the projection of the face 'l5 is shorter than theprojection of face l5 so that pressure exerted against the revolving door wing in the direction of the arrow Il in Fig. 3, tends to force latching member 2| radially inward against the yielding pressure of coil spring 32. The inner face 78 of latching member 2| engages the cam shaped face 'i5 of the adjacent coacting radially extending portion of the pin or auxiliary cam 54 and imparts rotative movement to the pin or auxiliary cam against the force of the coil spring 32. As the pin or auxiliary cam 54 rotates the teeth 53 meshing with pinion 5l, tend to rotate pinion 5| in a counterclockwise direction. Pinion 5| drives ratchet teeth 52, which are in engagement with ratchet teeth 5l, because of the fact that the socket wrench has been wholly removed from the socket 55 and coil spring 43 is continuously effective to maintain ratchet teeth 41 and 52 in engagement. Accordingly, pinion 40 is rotated through the interconnection of ratchet teeth 52 and 4l in a counterclockwisedirection. This operation imparts movement to the toothed periphery 4| of the flange i 5 of the main cam ii, thereby rotating the main cam ll in a clockwise direction and shifting the cam faces 25 out of alignment with the frusto-conical ends 29a of plungers 29. Such action results in the immediate shifting of the main cam under action of the ends 29a of all of the plungers 29 relieving the effective pressure of coil springs 32 upon latching membersZi so that rollers 38 individual to each of the revolving door wings are free to move out of the latching faces 35 to collapsed position illustrated in Fig. 4 or to complete bookfold position. Thus it will be seen that the pin or auxiliary cam 54 is closely coupled and coacts with the main cam I1 for effecting simultaneous release of the revolving door wings under conditions of panic. However, it will be observed that in presetting the revolving door hardware the close coupling between the pin or auxiliary cam and the main cam is interrupted as indicated in Fig.

11, allowing independent movement within limits.

of the main cam with respect to the auxiliary cam. The provision for limiting the movement of the pin or auxiliary cam with respect to the main cam by virtue of therabutment between lug 68 and face 69 of the main cam, insures complete protection of the pinion 40 with respect to the toothed iiange of the main cam.

It will be readily seen that when the revolving door wings are restored to normal position and latched by the latching members 2 I, that the pin or auxiliary cam is ready at all times to perform its assisting function in effecting simultaneous release of the revolving door wings under conditions of panic.

While I have described my invention in certain of its preferred embodiments, I desire that it be understood that modifications may be made and that no limitations upon my invention are intended other than may be imposed by the scope of the appended claims.

What I claiml as new and desire to secure by Letters Patent of the United States is as follows:

l. Revolving door mechanism comprising in combination with the wings of a revolving door,

each having separate latching means, a main cam for presetting the latching means for maintaining the door wings in radial positions, an independent auxiliary cam operative under conditions of excessive pressure against any one of saidv wings,

and means interconnecting said auxiliary cam with said main cam for imparting movement to said main cam and electing a disengagement of said latching means and allowing simultaneous release of all-of said door wings.

2. Revolving door mechanism comprising in combination with a housing for revolving door hardware including a plurality of radially displaceable wing latching members, a main cam for presetting said wing latching members in latched positions, an independent auxiliary cam, means the door wings in radial positions, an auxiliaryl cam, means for operating said main cam independently of said auxiliary cam and presetting said main cam in a position maintaining said latching means in latched positions, means interrupting the operation of the aforesaid means and. intercoupling said auxiliary cam for simultaneous movement with said main cam, and means for displacing said auxiliary cam under conditions of excess pressure against any one of said door wings for imparting movement to Vsaid main cam and effecting a simultaneous release of all of said latching means.

4. Revolving door mechanism comprising .in combination with the wings of ra revolving door,

each having separate latchingmeans, a main cam for presetting the latching means for maintaining the door wings in radial positions, an

excess pressure against the associated door wing,`

eiects an engagement of the said latching means with the associated extension on said auxiliary cam for imparting angular movement to said auxiliary cam and correspondingly shifting said main cam for effecting simultaneous release of all of said latching means.

5. Revolving door mechanism comprising in combination with the wings of a revolving door, each having separate latching means, a main cam for presetting the latching means for maintaining the door Wings in radial positions, an independent auxiliary cam having extensions thereon projecting into the path of movement of each of said latching means and engageable by any one of said latching means upon radial inward movement of said latching means, whereby saidauxiliary cam is angularly shifted, and means interconnecting said auxiliary cam. and said main cam for imparting movement to said main cam and effecting a disengagement of all of said latching means for allowing simultaneous release of all of said door wings.

6. Revolving door. mechanism comprising in combination with a housing for revolving door hardware including a plurality ofV radially displaceable wing latching members, a main cam for presetting said Wing latching members in latched positions, an auxiliary cam, said. main cam and said auxiliary cam each having a toothed peripheral portion, and pinion devices interconnecting the toothed peripheral portions of said cams.

7. Revolving door mechanism comprising in combination with a housing for revolving door hardware including a plurality of radially displaceable wing latching members, a main cam for presetting said wing latching members in latched positions, an auxiliary cam, said main cam and said auxiliary cam each having a toothed peripheral portion, pinion devices interconnecting the toothed peripheral portions of said cams, and a clutch for connecting or disconnecting said pinion devices.

8. Revolving door mechanism comprising in combination with a housing for revolving door hardware including a plurality of radially displaceable wing latching members, a main cam for presetting said wing latching members in latched positions, an auxiliary cam, said main cam and said auxiliary cam each having a toothed peripheral portion, pinion devices interconnecting the toothed peripheral portions of said cams, and a ratchet faced clutch interconnecting said pinion devices for driving said main cam and said auxiliary cam simultaneously in one direction while allowing independent movement of said cams in the opposite direction.

9. Revolving door mechanism comprising in Ycombination with a housing for revolving door hardware including a plurality of vradially displaceable wing latching members, a main cam for presetting said wing latching members in latched positions, anauxiliary cam, said main cam and said auxiliary cam each'having a toothed peripheral portion, pinion devices interconnecting the toothed peripheral portions of said cams, and a multi-toothed clutch interconnecting said pinion devices, said clutch having clutch faces normally spring pressed into engagement for effecting simultaneous movement of said auxiliary cam and said main cam, said clutch faces being separable for allowing movement of said auxiliary cam independently of said main cam.

10. Revolving door mechanism comprising in combination with a housing for revolving door hardware including a plurality of radially displaceable wing latching members, a main cam for presetting said wing latching members in latched positions, an auxiliary cam, each of said cams having a toothed peripheral portion, a coupling unit including a pair of pinion devices, one of which is engaged with the toothed peripheral portion of each of said cams, a clutch device and spring means for normally interengaging said pinion devices through said clutch device, said clutch device being displaceable for disengaging said pinion devices, whereby movement of said auxiliary cam may be transferred to said main cam when said clutch device is engaged, and whereby said auxiliary cam may move independently of said main cam when said clutch deviceis disengaged. l

11. Revolving door mechanism comprising -in combination With a housing for revolving door hardware including a plurality of radially displaceable wing latching members, a main cam for presetting said wing latching members `in latched positions, an auxiliary cam, means interconnecting said auxiliary cam with said main cam, means for imparting movement to said main cam through said auxiliary cam when any one of said Wing latching members is ldisplaced fromlatching position for effecting simultaneous release of all of said latching members, and

a lug carried by said auxiliary cam adapted to' coact with said main cam for limiting the movement of said auxiliary cam with respect to said main cam.

l2. Revolving door mechanism comprising in combination with a housing for revolving door hardware including a plurality of radially displaceable wing latching members, a main'` cam for presetting said wing latching members in latched positions, an auxiliary cam, means'interconnecting said Vauxiliary cam with said main cam, means for imparting movement to rsaid main cam through said auxiliary cam when any one of said wing latching members is .displaced from latching position for eifecting simultaneous release of all of said latching members, and resilient means for normally restraining said auxiliary cam against movement. l l Y,

13. Revolving door mechanism comprising in combination with a housing for revolving door hardware including a plurality of radially displaceable wing latching members, a main cam for presetting said wing latching members in latched positions, an auxiliary cam, means interconnecting said auxiliary cam with` said main cam, means for imparting movement to said main cam through said auxiliary caml whenany one of saidV wing latching members is displaced from latching position for effecting-simultaneous release of all of said latching members, aY lug carried by said auxiliary cam and adapted to coact with said main cam after a predetermined angular movement of said auxiliary cam, and means for yieldingly restraining-. the movement of said auxiliary cam.

le. Revolving door mechanism comprising in combination with a housing for revolving door hardware including a plurality of radially displaceable wing latching members, a main cam for presetting said wing latching members in latched positions, an auxiliary cam actuated by said wing latching members, coupling means extending between said cams and engageable or disengageable for transferring, when engaged, Vangular movement of said auxiliary cam to said main cam under conditions of excessive pressure against any one of said Wings, and spring means connected with said auxiliary cam for restoring said auxiliary cam to initial position. i

15. Revolving door mechanism comprising in combination with a housing for revolving door hardware including a plurality of radially displaceable wing latching members, a main cam for presetting said wing latching members in latched positions, an auxiliary cam, means interconnecting said auxiliary cam with said main cam, means for imparting movement to said main cam through said auxiliary cam when any one of said wing latching members is displaced from latching position for effecting simultaneous release of all of said latching members, and means for restoring said auxiliary cam to normal position independent of said main cam.

i6. Revolving door mechanism comprising in combination with a main actuating cam engageable with wing latching members, an auxiliary trigger cam having pairs of oppositely directed cam faces disposed on axes substantially normal to each other and engageable by said wing latching members, one of said cam faces having a toothed peripheral edge adjacent thereto for connecting said auxiliary cam with said main cam.

i7. In a revolving door mechanism, an auxiliary cam comprising a relatively fiat member having pairs of oppositely projecting cam faces disposed on axes substantially normal to each other, said cam being actuated by pressure on any one of said cam faces, one of said cam faces having an actuating toothed peripheral edge adjacent thereto, and another cam face having stop means extending adjacent thereof.

18. An auxiliary cam for revolving door mechanism comprising a relatively flat member having oppositely projecting cam faces disposed on axes substantially normal one to another, said cam being actuated by pressure on any one of said cam faces, one of said cam faces having an actuating toothed peripheral theretoya stop arm extending adjacent another cam face, and a separate abutment stop extending from said stop arm.

i9. An auxiliary cam for revolving door mechanism comprising a relatively flat member, cam faces projecting from said relatively flat member on axes extending substantially at right angles to each other, said cam being actuated by pressure on any one of said cam faces, an arm off-set from the plane of the fiat member constituting said cam and connected adjacent one of said cam faces for controlling the position of said cam, and gear actuating teeth on the peripheral edge of a portion adjacent another of said cam faces. A Y

20. An auxiliary cam for revolving door mechanism comprising a centrally apertured relatively at member, cam faces projecting in opposite directions from said relatively flat member on axes substantially normal to each other,

edge adjacent said cam being actuated by pressure on any one of said cam faces, an abutment stop disposed beneath one of said cam faces, a control arm extending adjacent said last mentioned cam face for controlling the position of said cam, a laterally extending abutment head on said control arm, and actuating gear teeth formed on the peripheral edge of a portion adjacent another of said cam faces. y

21. In combination, a shaft having a plurality of latched Wing members extending radially therefrom, means for simultaneously releasing all said Wing members upon the displacement of any one thereof, and means for maintaining the aforesaid means inoperative for individually restoring said Wing members to latohed position.

22. In combination, a shaft having a plurality of latched Wing members extending radially therefrom, trigger means for effecting simultaneous release of all said Wing members upon the displacement of any one thereof, and means for disengaging said trigger means for permitting individual restoration of said wing members to latched positions.

23. In combination, a shaft having latching means yengaged With a plurality of Wing members extending radially from said shaft, trigger` means connected with said latching means and operable upon the displacement of any of said Wing members for simultaneously releasing all said Wing members, and means for disconnecting said trigger means with said Wing members released for individually restoring said wing members to latched positions.

THURLOE M. HAGENBOOK. 

